I question the accumulating client instances, could be hundreds in a very short time. I noticed an ArrayList used to hold client instances, but I think its purpose is for tracking and sending messages back to the clients. I don't think it's used for disposal purposes.

I really only made a cursory examination of the code in that link, but at a glance it looks like the ArrayList is used to keep track of logged in clients. When an incoming message is received the server

I really only made a cursory examination of the code in that link, but at a glance it looks like the ArrayList is used to keep track of logged in clients. When an incoming message is received the server loops through the list and sends each client in the ArrayList a copy of the message. When a client sends the "i'm logging out" message the appropriate Client is removed from the ArrayList.

The garbage collector will clean-up any unused objects automatically - such as Client's that have been removed from the list - but the garbage collector runs when it thinks it's necessary. 100's of these objects doesn't really seem like a big deal to me - the client object probably doesn't use much memory.

Although, if the client is using network resources it may be wise to implement IDisposable on the client class, and then call client.Dispose() after removing it from the ArrayList, this way the network resources are released immediately instead of waiting for the garbage collector to get around to it.

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